create solution for 0080-remove-duplicates-from-sorted-array-ii

Author: Sam Luo

Diff for: java/0080-remove-duplicates-from-sorted-array-ii.java

@@ -0,0 +1,26 @@
+/*
+ * Time Complexity: O(n);
+ * Space Complexity: O(1);
+ */
+
+class Solution {
+    public int removeDuplicates(int[] nums) {
+        int count = 1;
+        int index1 = 0;
+        for(int i = 1; i < nums.length; i++){
+            if(nums[i] != nums[index1]){
+                count = 1;
+                index1 ++;
+                nums[index1] = nums[i];
+            }else{
+                count ++;
+                if(count <= 2){
+                    index1 ++;                    
+                    nums[index1] = nums[i];
+                }
+            };
+        };
+        return index1 + 1;
+    }
+}
+